Back cover for a handset



FIG. 1 is a perspective front view of a back cover for a handset showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

In the drawing, the broken lines depict unclaimed environment. 

The ornamental design for a back cover for a handset, as shown and described. 